Threshold resonances in vibrational excitation of HBr molecules by electron impact
- 11 July 1977
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 10 (10) , L399-L402
- https://doi.org/10.1088/0022-3700/10/10/008
Abstract
Vibrational excitation of HBr molecules by electron impact has been studied in a differential scattering experiment at threshold. The cross section is characterised by a narrow peak close to threshold followed by a broader maximum at higher energies, both of essentially isotropic angular dependence. This behaviour can be observed up to nu =5 excitations. The integral cross section for the nu =1 excitation in the threshold peak has an absolute value of several 10-15 cm2. The results are compared with threshold effects in the stronger polar hydrogen halides, HF and HCl.Keywords
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